Combined oil ring
Provided is a combined oil ring (10) in which carbon sludge and the like are not deposited between side rails (11) and a spacer expander (12) even if an internal combustion engine is operated for a long period of time. The combined oil ring is configured to be fitted in an oil ring groove (3) of a p...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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